Public story · 2026-03-22 · source-backed

Claude Code v2.1.78: StopFailure Hook Event and Sandbox Layering

Issue

2026-03-22

Confidence

source-backed

Sources

Redaction

passed

Story

The first failure-state hook in Claude Code's event system: StopFailure enables automation workflows to detect agent failures without polling. Also shipped: sandbox allowRead for fine-grained filesystem permissions and persistent plugin data storage for stateful plugins across sessions. Source

Claude Code uses Sonnet / Shared entities / Same source / Shared topic / Earlier coverage
Claude Code v2.1.77–78: Agent Frontmatter and 128K Output Ceiling.
Linked by a graph relationship (Claude Code uses Sonnet); both cover Claude Code, StopFailure; cite the same source (Source).
Boris Cherny uses Claude Code / Shared entity: Claude Code / Same source / Shared topic / What happened next / Tension
Yegge Predicts Code Review's End, HN Pushes Back
Linked by a graph relationship (Boris Cherny uses Claude Code); both cover Claude Code; cite the same source (Source).
Claude Code competes with Cursor / Shared entity: Claude Code / Same source / Shared topic / What happened next / Tension
Cursor and Claude Code Both Ship Classifier-Based Autonomous Execution in the Same Week. The Industry Just Chose Its Architecture.
Linked by a graph relationship (Claude Code competes with Cursor); both cover Claude Code; cite the same source (Source).
Miasma criticizes Claude Code / Shared entity: Claude Code / Same source / Shared topic / What happened next
Claude Code 2.1.166 adds fallback models, and if you run cron pipelines this is the fix you've wanted
Linked by a graph relationship (Miasma criticizes Claude Code); both cover Claude Code; cite the same source (Source).
Claude Code uses LSP / Shared entity: Claude Code / Same source / Shared topic / What happened next
The Code Editor Is Dead. Three Platforms Buried It in the Same Week.
Linked by a graph relationship (Claude Code uses LSP); both cover Claude Code; cite the same source (Source).
Claude Code uses OAuth / Shared entity: Claude Code / Same source / Shared topic / Earlier coverage
Claude Code v2.1.43-44: Critical Bug Fixes
Linked by a graph relationship (Claude Code uses OAuth); both cover Claude Code; cite the same source (Source).
Claude Code uses MCP / Shared entity: Claude Code / Same source / Shared topic / What happened next / Tension
Claude Code's doctor command audits your context budget
Linked by a graph relationship (Claude Code uses MCP); both cover Claude Code; cite the same source (Source).
OpenAI uses Claude Code / Shared entity: Claude Code / Same source / Shared topic / What happened next
Claude Code sessions can now message each other, and nobody's threat-modeled it yet
Linked by a graph relationship (OpenAI uses Claude Code); both cover Claude Code; cite the same source (Source).

Source trail

Source

Entities

Claude Code Sandbox Layering The StopFailure StopFailure Hook Event

Provenance

Canonical issue: Ramsay Research Agent — 2026-03-22
AI generated: no
Story unit: 2026-03-22-claude-code-v2-1-78-stopfailure-hook-event-and-sandbox-layering
Labels: source-backed, canonical briefing excerpt

Fetching from the wire…

Claude Code v2.1.78: StopFailure Hook Event and Sandbox Layering

Story

Related stories

Claude Code v2.1.77–78: Agent Frontmatter and 128K Output Ceiling.

Yegge Predicts Code Review's End, HN Pushes Back

Cursor and Claude Code Both Ship Classifier-Based Autonomous Execution in the Same Week. The Industry Just Chose Its Architecture.

Claude Code 2.1.166 adds fallback models, and if you run cron pipelines this is the fix you've wanted

The Code Editor Is Dead. Three Platforms Buried It in the Same Week.

Claude Code v2.1.43-44: Critical Bug Fixes

Claude Code's doctor command audits your context budget

Claude Code sessions can now message each other, and nobody's threat-modeled it yet

Source trail

Entities

Provenance

Claude Code v2.1.78: StopFailure Hook Event and Sandbox Layering

Story

Related stories

Claude Code v2.1.77–78: Agent Frontmatter and 128K Output Ceiling.

Yegge Predicts Code Review's End, HN Pushes Back

Cursor and Claude Code Both Ship Classifier-Based Autonomous Execution in the Same Week. The Industry Just Chose Its Architecture.

Claude Code 2.1.166 adds fallback models, and if you run cron pipelines this is the fix you've wanted

The Code Editor Is Dead. Three Platforms Buried It in the Same Week.

Claude Code v2.1.43-44: Critical Bug Fixes

Claude Code's doctor command audits your context budget

Claude Code sessions can now message each other, and nobody's threat-modeled it yet

Source trail

Entities

Provenance